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-rw-r--r--lib/python/qmk/commands.py6
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/python/qmk/commands.py b/lib/python/qmk/commands.py
index 873380c28b..b0b8ccb244 100644
--- a/lib/python/qmk/commands.py
+++ b/lib/python/qmk/commands.py
@@ -101,6 +101,12 @@ def dump_lines(output_file, lines, quiet=True):
if output_file and output_file.name != '-':
output_file.parent.mkdir(parents=True, exist_ok=True)
if output_file.exists():
+ with open(output_file, 'r', encoding='utf-8', newline='\n') as f:
+ existing = f.read()
+ if existing == generated:
+ if not quiet:
+ cli.log.info(f'No changes to {output_file.name}.')
+ return
output_file.replace(output_file.parent / (output_file.name + '.bak'))
with open(output_file, 'w', encoding='utf-8', newline='\n') as f:
f.write(generated)